73mm DZ240 Core Barrel Core Tube Drilling Rod For Core Drilling API ISO9001
| Type | Drill Pipe, Drill Rod |
|---|---|
| Material | Stainless Steel |
| Processing Type | Forging |
| Application | Quarry, Rock Drilling, Mining |
| Use | Ore Mining, Coal Mining, Well Drilling, Rock Drilling, Quarry |
The 73mm DZ240 Core Barrel is a specialized drilling component designed for core drilling operations. This core tube attaches to the top of the drill bit to securely hold and protect the core sample while serving as a guide tool during drilling operations.
A standard core tube consists of a seamless steel tube with wire connections at both ends, featuring a diameter slightly smaller (2-4mm) than the drill bit. Single core pipes typically measure 3-45 meters in length. For enhanced stability and to prevent drilling hole bending, multiple core pipes can be connected to form longer, thicker diameter drilling tools.
| Standard | Size | O.D×W | ID | Material | Remark |
|---|---|---|---|---|---|
| GB/T16950-1997 | 73 | Φ73x4.5 | Φ64 | DZ40 | Length and thread depends on customer demands |
| 89 | Φ89x4.5 | Φ80 | DZ40 | ||
| 108 | Φ108x4.5 | Φ99 | DZ40 | ||
| 127 | Φ127x4.5 | Φ116 | DZ40 | ||
| 146 | Φ146x5 | Φ136 | DZ40 | ||
| 168 | Φ168x6.5 | Φ155 | DZ40 | ||
| DCDMA | AW | Φ57.4x4.40 | Φ48.6 | R780 | |
| BW | Φ73.2x6.35 | Φ60.5 | R780 | ||
| NW | Φ89.1x6.35 | Φ76.4 | R780 | ||
| HW | Φ114.3x6.35 | Φ101.6 | R780 | ||
| PW | Φ139.7x7.10 | Φ125.5 | R780 | ||
| SW | Φ168.3x6.15 | Φ155.7 | R780 |
- Simple structure with easy operation
- Excellent coaxiality for precise drilling
- Extended service life for cost efficiency
- Improved rock and ore core adoption rate
- Ensures complete integrity of core samples
Note: New drill tubes should be properly prepared before use:
- Apply thread oil before initial connection
- Perform make up and break operations at least 3 times before drilling
- Special requirements (hard bending, plastic coating) can be customized
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